[Pkg-rust-maintainers] Processed: rust-botan-sys: Add botan3 to default features

[Debian Bug Tracking System]

Processing control commands:

> block 1109756 by -1
Bug #1109756 [src:botan] botan: Version 2 has reached EOL
1109756 was blocked by: 1108993 1109758 1109760 1109765
1109756 was not blocking any bugs.
Added blocking bug(s) of 1109756: 1109768

-- 
1109756: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1109756
1109768: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1109768
Debian Bug Tracking System
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